• Heart (myocardium, AV node, vagus) — slow, weak, intermittent pulse; faintness on least motion; must lie still or fears the heart will stop (see Heart/Generalities). [Hering], [Nash], [Kent].
• Circulation/venous system — cyanosis, cold extremities, dusky face; feeble capillary return; collapse with cold sweat (see Face/Skin/Chill-Heat-Sweat). [Allen], [Clarke].
• Kidneys (cardio-renal axis) — scanty urine or suppression in cardiac dropsy; urination relieves oppression slightly (see Urinary/Generalities). [Hering], [Boericke].
• Serous membranes — hydrothorax/ascites secondary to cardiac failure; orthopnoea; oedema pitting (see Chest/Abdomen/Extremities). [Clarke], [Farrington].
• Stomach/vagus — extreme nausea from the slightest motion; sinking at epigastrium; aversion to food; retching without relief (see Stomach). [Allen], [Nash].
• Liver/bile — pale, clay-coloured stool, jaundice from biliary paresis with cardiac congestion (see Abdomen/Rectum/Skin). [Hughes], [Clarke].
• Retina/optic nerve — xanthopsia (objects look yellow/green/blue), dim sight, halos (see Eyes). [Allen], [Hering].
• Respiration — orthopnoea, short breath on the least effort; must be propped; blue lips (see Respiration/Chest). [Hering], [Farrington].
• Brain/nerve — great weakness, somnolence, starts from sleep, fear of death; vertigo on rising (see Mind/Head/Sleep). [Kent], [Allen].
• Male sexual sphere — diminished desire, relaxed genitals, prostration (see Male). [Clarke].
• Skin/cellular tissue — cool, clammy sweat; oedema of feet/ankles; mottled skin (see Skin/Extremities). [Hering].

• Lying perfectly still, especially on the right side when nauseated (gastric–vagal quieting). [Nash], [Allen].
• Head and shoulders slightly raised (orthopnoea eased) while avoiding active sitting up. [Hering], [Clarke].
• Open, cool air to the face without exertion (relieves faintness temporarily). [Clarke].
• After passing urine (brief relief of oppression). [Boericke].
• Gentle, sustained warmth to the precordium and epigastrium (vagal spasm calms). [Farrington].
• Small sips, not draughts; bland food in minute quantities. [Allen].
• Quiet, darkness—less visual strain and head swimming. [Hering].
• After a nap (short), if not startled—gives transient steadiness. [Kent].

• Least motion or effort (walking, turning in bed, sitting up)—pulse flags, syncope threatens, nausea returns. [Hering], [Nash].
• After meals, particularly heavy or fatty food—gastric distress and cardiac oppression. [Allen], [Clarke].
• Rising from bed—vertigo, faintness, cold sweat. [Hering].
• Emotional excitement, startling noises—palpitation, irregularity, fear heart will stop. [Kent].
• Cold, damp weather (circulatory depression), yet heat of bed may bring restlessness. [Clarke].
• Night, especially after midnight—oppression, starts from sleep. [Allen], [Kent].
• Talking or exertion of voice—dyspnoea, irregular pulse. [Farrington].
• Stooping or bending—head swims, heart flutters. [Allen].
• Tobacco and alcohol—worsen nausea and rhythm. [Clarke].
• Losses (fluids) or long fasting—exhaustion deepens; empty, sinking stomach. [Nash].

Anxiety centres on the heart’s action: a fixed fear that the heart will cease if he moves, hence an extraordinary desire to lie perfectly still—a keynote differentiating Dig. from the restless anguish of Arsenicum or the constrictive struggle of Cactus [Kent], [Nash]. There is presentiment of death, yet movements or speech are avoided lest the heart fail; the courage to move is lost, not from nervousness but from organ‐fear ([Proving]/[Clinical]). Sadness and taciturnity alternate with sudden starts, easily frightened by the least noise; irritability from cardiac oppression; indifference in advanced failure [Hering], [Allen]. Intellectual effort fatigues; memory sluggish; a blankness comes with the sinking at epigastrium (Mind ↔ Stomach). The patient dreads night because sleep is broken by startings and a sense of stopping heart; he dozes, awakes with a gasp (Mind ↔ Sleep) [Kent]. Consolation aggravates (he cannot bear talk); he answers slowly, whispers, then relapses into silence. Fear of death is not melodramatic; it is physiological, proportional to the irregular, failing pulse and the cold sweat that accompanies any attempt to move [Kent], [Allen]. Unlike Gels., he is not drowsy from stupor but from circulatory feebleness; unlike Ign., tears do not relieve. Improvement of the urine or a steadier pulse reduces dread (Urinary/Heart cross-relief). Case: A valvular patient lay fixed, “if I move my heart will stop”; Dig. steadied the pulse, and with return of urine his fear abated [Clarke].

Vertigo on rising or turning the head, with blackness before eyes and faintness (Worse motion) [Allen]. Head feels empty yet heavy; frontal pressive pains with slow pulse; forehead cold sweat during sinking spells (Chill/Heat/Sweat) [Hering]. Congestive fullness comes on lying low, yet sitting up aggravates faintness; finds a compromise with head slightly raised (Modalities). Occipital dragging when the heart flags; stooping increases swimming. Mental work brings fluttering and confusion. The head clears a little after a small stool or urine (cross-relief). Compare Glon. (violent throbs from vasodilatation), Gels. (dull, drowsy, tremulous), while Dig. has vagal nausea + slow, failing pulse [Kent].

Xanthopsia: sees everything yellow, sometimes green or blue; coloured halos around lights [Allen], [Hering]. Dim sight with vertigo on rising; pupils dilated or sluggish; ocular muscles weak. Lids bluish, oedematous in cardiac dropsy; conjunctivae slightly icteric with hepatobiliary stasis (Affinity link) [Clarke]. Reading fatigues the heart; must stop for palpitation. Light dazzles; darkness and rest relieve (Modalities). Compare Chrom-ac. (vivid yellow vision with burning), Jaborandi (sweats without heart picture); Dig. is uniquely cardio-visual. [Hughes], [Allen].

Buzzing, roaring, or pulsation in ears synchronous with the heartbeat. Sudden deafness with vertigo. Ears feel stuffed or plugged. Tinnitus before fainting. Hearing diminished during jaundice or exhaustion.

Coldness of tip of nose, sometimes bluish in heart failure. Nosebleeds in elderly or weak patients. Nasal mucosa pale. Sensation of fullness or obstruction from sluggish circulation. Sneezing brings on faintness or palpitations.

Dusky, cyanotic, deathly pale or ashy; bluish eyelids; anxious, sunken face during sinking spells [Hering]. Lips bluish; cold sweat beads on face; cheeks collapse with faintness. Puffiness around eyes in cardiac dropsy; expression fearful yet motionless. The face becomes more natural as pulse steadies and urine flows (Urinary link). Compare Carbo-veg. (collapse, cold breath, desire to be fanned) vs Dig. (must be still, pulse slow irregular). [Clarke], [Kent].

Dryness with sticky saliva; tongue white or clean but tremulous; bitter or metallic taste after food (Worse after meals) [Allen]. Breath cold; breathlessness on talking. Thirst is not prominent; small sips preferred. Nausea originates at epigastrium rather than in mouth. Gums pale in failing circulation.

Gnashing of teeth in convulsions (rare). Toothache from congestive states or neuralgia, better with cold applications. Gums swollen, bleed easily. Tooth pain linked to liver or heart disturbances.

Sensation of constriction about the throat from cardiac oppression; swallowing worsens nausea (Stomach link). Pharynx otherwise uninflamed; voice low, weak. Tight collars intolerable (Heart/Respiration).

A grand keynote. Nausea from the slightest motion; he dares not move his eyes; relieved by lying on the right side, worsened on sitting up [Nash], [Allen]. Sinking, goneness at the epigastrium accompanies fear and faintness; eructations afford no relief [Hering]. Aversion to food; after meals a sense of deathly oppression and fluttering (Modalities). Vomiting, if present, is of bitter mucus or food; it weakens the heart further—danger sign in Dig. states [Clarke]. Warmth to the epigastrium soothes; cold drinks aggravate. Compare Apoc-c. (vomits water immediately in dropsy with suppression—Apoc-c. has more water-intolerance); Ant-t. (nausea with rattling chest); Ipec. (persistent nausea with clean tongue but no slow pulse). Dig. is vagal-cardiac. [Farrington], [Nash].

Fullness and tenderness under right ribs from biliary paresis; pale, clay-coloured stool; jaundiced skin in some cardiac states (Liver affinity) [Hughes], [Clarke]. Abdomen distended with ascites in advanced failure; fluid wave; uncomfortable on lying flat; better propped (Chest link). Flatus scant; a soft stool or urine gives slight relief to oppression (cross-relief). Spleen not characteristic. Compare Chel. (knife pains to scapula; strong biliary keynote) and Card-m. (liver, portal congestion) vs Dig. where cardiac phenomena lead. [Kent].

Scanty urine; dark, high specific gravity; sometimes albumen in cardio-renal states; urination relieves oppression slightly (modal cross-relief) [Boericke], [Hering]. Suppression threatens in advanced failure; dropsy increases. Frequent urging with little passed or no urging at all. Compare Apoc-c. (urine suppressed with water-vomit), Ars. (burning, anxious), Squilla (urinary with cough). Dig. stands where slow, irregular pulse leads the scene. [Farrington].

Constipation with no desire and great inactivity of rectum. Hard, dark stools. Straining may provoke faintness or cold sweat. Diarrhoea, sudden and profuse, alternating with constipation. Rectal haemorrhoids with oozing, bleeding, and pain during defecation. Stool greenish, offensive during hepatic flare.

Genitals relaxed; diminished desire; emissions with profound prostration [Clinical] [Clarke]. Sexual excitement aggravates palpitation and faintness (Worse excitement). Hydrocele from heart failure occurs. Compare Selenium (exhaustion after coitus) without Dig.’s slow pulse keynote.

Menses scanty or suppressed in cardiac failure; palpitation and faintness worse at menses; oedema of ankles before period [Clinical] [Clarke]. Pregnancy with failing compensation—orthopnoea, slow irregular pulse—calls attention to Dig., though obstetric caution is implied. Lochia scant with faintness in decompensation.

Short breath on least exertion; must be kept very quiet; sighing; cannot bear pressure over the chest [Hering]. Orthopnoea at night; desires cool air to face; bluish lips, cold nose (Face link). Talking aggravates (Worse talking). Better propped and silent. Compare Samb. (spasmodic, after midnight), Ant-t. (rattling), Lob. (suffocation with weakness), while Dig. has the slow, irregular pulse. [Farrington], [Kent].

The centre. Pulse slow, weak, intermittent, becoming irregular at the least motion; fear of death and of moving lest the heart stop [Hering], [Nash], [Kent]. Palpitation from speaking, minimal exertion, or emotion; precordial anxiety with epigastric sinking (Heart ↔ Stomach). The beats are sometimes strong but abortive, followed by long pauses felt in the throat; pulse may be relatively slow with great weakness (AV block picture) [Allen], [Hughes]. Angina-like pains may occur, but the vagal nausea and stillness distinguish Dig. from the struggling, restless pain of other anginal remedies. Cyanosis, cold extremities, and clammy sweat attest failing output. As urine increases and pulse steadies, fear and oppression recede (Urinary cross-relief). Compare Crataegus (tonic in heart failure, little keynote), Cactus (band constriction), Spigelia (neuralgic stitches with palpitation), Arsenicum (restless anxiety). [Farrington], [Kent], [Clarke].

Oppression as if the heart had not room to beat; must avoid lying flat; orthopnoea; clutches at heart yet cannot move [Hering]. Hydrothorax may coexist; percussion dull bases; breath sounds diminished. Every exertion causes fluttering; speech short. Better quietly propped (Modalities). Compare Cactus (iron band constriction—more spasmodic), Ars. (restless burning), Ant-t. (rales). [Farrington], [Kent].

Weakness across the small of the back with coldness; must lie still; faintness when attempting to sit (Worse sitting up). No sharp neuralgias. Oedema around sacrum in anasarca. Warmth to back soothing.

Oedematous ankles and feet; pitting on pressure; cold, bluish, numb; hands tremble on exertion (Skin link) [Hering], [Clarke]. Cramps in calves at night; weak knees; can hardly stand. Walking a few steps brings palpitations and faintness (Modalities). Compare Apis (hot, stinging oedema, thirstless), Carbo-veg. (collapse, desire to be fanned).

Cool, clammy, mottled; livid places; bluish nails; tendency to jaundice in biliary paresis (Affinity link) [Hughes], [Clarke]. Sweat on face and precordium with faintness; sweat does not relieve (contrast remedies where sweat is curative). In collapse, skin is ashy with cold, sticky perspiration.

Sleep is broken by startings, as if the heart stopped, and the patient wakes with a gasp, afraid to move lest the heart cease (Mind ↔ Heart) [Kent], [Hering]. He dozes superficially, hears noises, and is easily startled; least motion in bed renews nausea and fluttering (Modalities; Stomach). Early night is worse; after midnight orthopnoea compels a propped posture, yet sitting up fully brings faintness (Respiration ↔ Heart). Dreams are anxious, of falling, of dying; waking leaves a deathly sinking at the epigastrium. If he naps after breakfast without moving, he may rise a little steadier; but a wrong movement sends him down again. Warmth within reason comforts; the heat of bed may aggravate restlessness although the surface remains cold and clammy (Chill/Heat/Sweat). Turning to the right side can ease nausea enough to gain a little rest (Stomach cross-relief) [Nash]. Talking in sleep or sudden noises bring palpitations. As the urine increases and pulse gaps lessen, the sleep deepens; number of startings diminishes—clinical sign that Dig. is acting (Urinary link). Compare Ars. (cannot keep still, burning anxiety after midnight) and Gels. (drowsy stupor without organ-fear); Dig. is stillness with dread.

Frightening dreams of death, falling, or heart failure. Dreams of being chased, suffocated. Anxiety of being alone or deserted. May dream of flooding or failing organs. Dreams often reflect cardiac fears [Allen], [Kent].

Low, remittent; chilly with cold, clammy sweat on face; heat local to head and precordium; pulse slow, weak, intermittent (Chill/Heat/Sweat) [Hering]. Thirst not marked; small sips preferred. Fever is not central; circulatory failure is.

Chill: internal chilliness; cold extremities with blue lips.
Heat: flush in head/chest with palpitation; intolerant of exertion.
Sweat: cold, clammy, chiefly on face, precordium, hands; non-relieving until the circulation steadies (Urinary/Heart cross-relief). [Hering], [Clarke].

Little desire for food; worse after meals; nausea and sinking; prefers small sips warm; alcohol and tobacco disagree (Modalities) [Allen], [Clarke]. Milk or fatty food aggravate. Cravings are not guiding; the reaction to motion/food with vagal nausea is.

Digitalis synthesises a vago-cardiac collapse picture: slow, weak, intermittent pulse that fails on the least motion, vagal nausea with epigastric sinking, fear to move lest the heart stop, cyanosis, scanty urine, and dropsy [Hering], [Allen], [Nash], [Clarke]. The pace is subacute to chronic; reactivity is low; thermal state is chilly with cold sweat. The modalities are consistent across sections—worse least motion, sitting up, after meals, talking, emotion, night; better absolute stillness, lying quietly (often on right side for nausea), small sips, gentle warmth, head slightly raised. Organ links are strong: Heart ↔ Stomach (sinking and nausea with rhythm failure), Heart ↔ Urinary (urination relieves oppression), Heart ↔ Eyes (xanthopsia), Heart ↔ Liver (clay stool, jaundice). Compared with Apoc-c., both have dropsy and orthopnoea; Apoc-c. vomits water immediately with renal suppression; Dig. has slow irregular pulse and nausea from motion, not from water per se. Compared with Cactus, which struggles against an iron band with restlessness, Dig. lies still with dread of stopping heart. Arsenicum is anxious, restless, burning, thirsty for sips; Dig. is quiet, chilly, with sinking and fear to move. Gelsemium is tremulous and drowsy without cardiac dread. Improvement under Dig. is traced by: (1) fewer pulse gaps on motion, (2) less epigastric sinking, (3) urine increasing, (4) oedema softening, and (5) sleep with fewer startings—a practical therapeutic arc. [Farrington], [Nash], [Clarke].

Cardiac failure / Arrhythmia

• Cactus grandiflorus — Iron-band constriction, violent struggle, congestive headache; Dig.: vagal nausea, slow intermittent pulse, stillness. [Kent], [Farrington].
• Crataegus — General myocardium tonic; lacks Dig.’s strong modalities and xanthopsia; use for tonic support once acute dread passes. [Clarke].
• Arsenicum album — Restless anxiety, burning, thirst for sips retained; Dig.: stillness, little thirst, fear to move. [Nash].
• Gelsemium — Tremulous weakness, drowsy; heart weak but no fear heart will stop; pulse soft, not distinctly slow-irregular from motion. [Kent].
• Spigelia — Sharp precordial neuralgia, stabbing with palpitation, left arm pains; Dig. has sinking and brady-arrhythmia, less stabbing pain. [Farrington].
• Kalmia — Shooting heart pains radiating to left arm with numbness; pulse may be slow, but gastric nausea and stillness less marked than Dig. [Kent].
• Aconite — Acute panic, bounding pulse; Dig. is chronic slow, dread to move, cold sweat. [Kent].
• Lobelia — Oppression with weakness, nausea; lacks pulse keynote and fear to move. [Farrington].

Dropsy / Orthopnoea

• Apocynum cannabinum — Dropsy with vomits water immediately and renal suppression; Dig.: nausea from motion, not water, with slow, irregular pulse. [Nash], [Hering].
• Apis — Hot, shining oedema, stinging pains, often thirstless; Dig.: cold, clammy oedema, slow pulse, vagal nausea. [Kent].
• Antimonium tart. — Rattling respiration, somnolence; stomach upset; Dig.: less rales, more pulse and vagal signs. [Farrington].
• Aralia/Sambucus — Paroxysmal nocturnal dyspnoea without cardio-renal picture. Dig. has cardiac base. [Kent].

Biliary / Jaundice

• Chelidonium — Biliary pains, right to scapula, yellow tongue; Dig.: clay stool, cardiac dread, slow pulse. [Hughes].
• Carduus mar. — Hepatic congestion, haemorrhoids; Dig. when heart failure coexists. [Clarke].
• Merc. — Jaundice with salivation and mouth ulcers (not Dig. pattern). [Kent].

Visual / Colour change

• Chromium acidum — Yellow vision with corrosive pains; Dig.: xanthopsia without corrosions, with slow pulse. [Allen].
• Sant-v. — Yellow vision in worm states; not cardiac. [Allen].

Gastric / Vagal

• Ipecacuanha — Persistent nausea with clean tongue, not relieved by lying right side, no cardiac dread. Dig.: nausea from motion, better lying right side. [Nash].
• Tabacum — Deadly nausea with cold sweat and prostration; pulse not characteristically slow-irregular; more sinking collapse than cardiac field. [Farrington].

• Complementary: Apocynum cannabinum (serous effusions with water-intolerance stage), Crataegus (myocardial nutrition after Dig. steadies rhythm), Arsenicum (residual anxiety and restlessness once pulse steadier), China (convalescence after fluid losses, tapping/diuresis). [Farrington], [Clarke], [Nash].
• Follows well: Aconite (acute panic subsides, reveals slow-weak pulse picture); Cactus (band eased, vagal nausea remains). [Kent].
• Precedes well: Apoc-c., Squilla, Convallaria if kidneys/chest need continued support after rhythm steadies. [Farrington].
• Antidotes (functional): rest, quiet, small sips warm fluid, avoidance of tobacco/alcohol—physiologic supports in Dig. states. [Clarke].
• Inimical/Conflicts: None emphasised classically; avoid alternating with cardiac allies without indications.

• Brady-arrhythmia with vagal nausea: Dig. 6C–30C in sensitive patients; repeat to response. Track nausea vs motion, pulse gaps, urine—first improvements are small but decisive. [Nash], [Farrington].
• Cardiac dropsy/orthopnoea: Alternate positional care (quietly propped) with Dig. (6C–200C per sensitivity). When urine begins to flow and orthopnoea eases, consider Crataegus to nourish myocardium. [Clarke], [Farrington].
• Biliary paresis with clay stool in heart failure: Dig. as intercurrent to restore bile flow; follow with Chel./Card-m. if hepatic signs persist after rhythm steadies. [Hughes], [Clarke].
• Night startings “heart stops in sleep”: Dig. at bedtime (30C) for several nights; improvement is fewer startings and less dread to move on waking. [Kent].
• Case pearls 

• • Mitral regurgitation with pulse 48, intermittent, fear to move, nausea from the slightest motion: Dig. 30C q2h → pulse steadier, urine ↑, oedema ↓ over 48 h. [Clarke].
  • Orthopnoea, blue lips, cold sweat, clay stools: Dig. 200C single dose → sleep propped, startings fewer; Apoc-c. followed for pleural effusion. [Farrington].
  • Old man with xanthopsia, slow irregular pulse, faint on rising: Dig. 6C b.i.d. → reading possible, fewer pulse gaps; Crataegus added for tone. [Hughes].

Mind

• Mind — FEAR — heart will cease beating — if he moves. (Organ-fear that enforces stillness.) [Kent].
• Mind — ANXIETY — about the heart — without restlessness. (Quiet dread.) [Kent], [Clarke].
• Mind — STARTS — on falling asleep — wakes with fear of stopping heart. (Sleep cross-link.) [Allen].
• Mind — TACITURN — answers slowly — indifference from weakness. (Low reactivity.) [Hering].

Head / Eyes / Ears

• Vertigo — on rising — with faintness. (Worse motion.) [Allen].
• Head — SWEAT — cold — forehead — with syncope. (Collapse sign.) [Hering].
• Vision — YELLOW (xanthopsia); Vision — halos around lights. (Retinal sign.) [Allen], [Hering].
• Hearing — NOISES — rushing — on rising. (Circulatory.) [Allen].

Stomach

• Nausea — from the slightest motion — better lying on right side. (Vagal keynote.) [Nash], [Allen].
• Stomach — EMPTINESS — epigastrium — sinking. (Cardio-vagal axis.) [Hering].
• Stomach — AVERSION — to food — worse after meals. (Modal.) [Allen].

Abdomen / Rectum / Liver

• Liver — FUNCTION — biliary — clay-coloured stool. (Hepatic paresis.) [Hughes], [Clarke].
• Abdomen — ASCITES — with cardiac disease. (Serous sphere.) [Clarke].
• Rectum — STOOLS — pale — clay. (Key liver sign.) [Clarke].

Urinary

• Urine — SCANTY — in cardiac disease. (Cardio-renal.) [Hering], [Boericke].
• Urination — RELIEVES oppression temporarily. (Cross-relief.) [Boericke].
• Kidney — ALBUMINURIA — with heart disease. (CR axis.) [Clarke].

Chest / Heart / Respiration

• Heart — PULSE — slow — intermittent — worse on least motion. (Crown rubric.) [Hering], [Allen].
• Heart — PALPITATION — from talking, emotion, slight exertion. (Trigger rubrics.) [Farrington].
• Respiration — ORTHOPNOEA — must be propped — cannot lie flat. (Night aggravation.) [Hering], [Clarke].
• Chest — OPPRESSION — as if heart had not room to beat. (Subjective heart.) [Kent].

Extremities / Skin

• Extremities — OEDEMA — ankles, feet — pitting. (Dropsy.) [Hering].
• Skin — COLOUR — cyanotic; cold, clammy sweat. (Circulatory failure.) [Clarke], [Hering].
• Nails — BLUE. (Peripheral cyanosis.) [Allen].

Sleep / Generalities

• Sleep — STARTING — on going to sleep — fears heart has stopped. (Pathognomonic feel.) [Allen], [Kent].
• Generalities — MOTION — aggravates (even slight); REST — absolute — ameliorates. (Global modality.) [Hering].
• Generalities — AFTER MEALS — aggravates. (Vago-cardiac.) [Allen].
• Generalities — COLD SWEAT — with faintness. (Danger sign.) [Hering].

Hahnemann — Materia Medica Pura (1821): primary proving—slow, irregular pulse, nausea from motion, epigastric sinking, visual tints.
Hering — The Guiding Symptoms of Our Materia Medica (1879): clinical confirmations—fear to move, orthopnoea, cold clammy sweat, urinary relief, dropsy.
Allen, T. F. — Encyclopaedia of Pure Materia Medica (1874–79): toxicology/provings—xanthopsia, brady-arrhythmia, gastric vagal phenomena, modalities.
Hughes, R. — A Manual of Pharmacodynamics (1870s): pharmacologic rationale—vagotonia/AV block; hepatic/renal ties; comparisons.
Clarke, J. H. — A Dictionary of Practical Materia Medica (1900): heart failure, hydrothorax/ascites, biliary paresis with clay stool; dosing/clinical arcs.
Farrington, E. A. — Clinical Materia Medica (1887): cardiac/differential analysis (Cactus, Apoc-c., Ant-t., Crataegus).
Nash, E. B. — Leaders in Homoeopathic Therapeutics (1899): keynotes—nausea from the least motion, fear heart will stop if he moves; right-side relief.
Kent, J. T. — Lectures on Homoeopathic Materia Medica (1905): mental/organ portraits; differentials (Ars., Gels., Spig., Cactus).
Boericke, W. — Pocket Manual of Homoeopathic Materia Medica (1901): succinct keynotes—brady-arrhythmia, urinary relief, clammy sweat.
Boger, C. M. — Synoptic Key (1915): general analysis—modalities, organ links, serous states.
Dunham, C. — Lectures on Materia Medica (1879): organ-remedy method; cardiac therapeutics context.
Tyler, M. L. — Homeopathic Drug Pictures (1942): narrative synthesis—stillness, sinking, slowness; bedside differentiations.